*Word has it that R&B star Usher and former Guns ‘N Roses guitarist Slash are slated to make surprise appearances with the Black Eyed Peas for the Super Bowl halftime show.

A person familiar with plans for Sunday’s halftime show spoke to the AP on condition of anonymity Wednesday, because the musicians’ performances were not going to be announced.

Black Eyed Peas member will.i.am is featured on Usher’s hit single “O.M.G.”

Slash has performed Guns ‘N Roses song “Sweet Child o’ Mine” on tour with the Black Eyed Peas; he also collaborated with Black Eyed Peas member Fergie on the song “Beautiful Dangerous” last year.

Sunday’s NFL championship game is between the Pittsburgh Steelers and Green Bay Packers at Cowboys Stadium. The NFL announced in November that the Black Eyed Peas would be the featured Super Bowl halftime performer.

Past halftime acts have included U2, the Rolling Stones, Bruce Springsteen & The E Street Band, Paul McCartney and Prince.